IWC Schaffhausen Ingenieur watches

The IWC Ingenieur is the brand's anti-magnetic watch line. It began in 1955 with Reference 666, which used a soft-iron inner case to shield the movement from magnetic fields; Fratello puts that protection at up to 80,000 A/m. The first watches came as the dateless 666A and the 666AD with date, in a 36.5 mm case.

In 1976 Gérald Genta redesigned the watch as the Ingenieur SL. His version set the features later generations came back to: a screwed-down bezel with five recesses and an integrated H-link bracelet. The 1976 SL, reference 1832, is known as the "Jumbo". In 2005 IWC introduced reference 3227, a 42 mm watch with the in-house calibre 80110. A later generation moved the case back to the round shape of the 666 while keeping larger proportions, and at the end of 2024 IWC released a new design that again echoes Genta's SL.

Around those milestones the Ingenieur has taken many forms. The SL Automatic, Midsize and Mecaquartz Chronograph Alarm are compact 34 mm watches, in steel, two-tone or gold. The Ingenieur Automatic runs from 40 to 46 mm, the bigger sizes used for AMG and Mission Earth models, and the Big Ingenieur measures 45.5 mm. Among the chronographs, the 42 mm Chronograph Classic comes in steel or red gold, and the 42.3 mm Chronograph Custom pairs those cases with two-tone dials on calf, rubber, NATO or bracelet. The Perpetual Calendar Digital Date-Month and the Constant-Force Tourbillon take the line into titanium, red gold, platinum and ceramic. Many limited editions carry motor-racing names, from Mercedes-AMG and Lewis Hamilton to a unique Nico Rosberg piece.